Weather Records on 1 May 1940

731 weather records were set or tied worldwide on 1 May 1940. Highest significance: Beaver Lake, CA.

Key Facts for 1 May 1940

On 1 May 1940, 731 weather records were set or tied at long-record stations worldwide.
94 were record highs and 89 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 35 monthly and 696 daily.
Beaver Lake set a daily record precipitation of 27.9 mm (1.1 in) on 1 May 1940.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 441 records.

Record Map

731 stations

731 station records on 1 May 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 May 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Beaver Lake	Canada	Record daily precipitation	27.9 mm (1.1 in)	53 of 100 (Notable)
Valparaiso Wtr Wks	United States	Record daily precipitation	67.1 mm (2.6 in)	49 of 100 (Notable)
Sivakasi	India	Record daily precipitation	73.7 mm (2.9 in)	47 of 100 (Notable)
Olympia Priest Pt Park	United States	Record daily precipitation	55.9 mm (2.2 in)	47 of 100 (Notable)
Ko253Lpatti Sr	India	Record daily precipitation	63.8 mm (2.5 in)	46 of 100 (Notable)
Thomasville	United States	Record daily precipitation	128.8 mm (5.1 in)	46 of 100 (Notable)
Casey	United States	Record daily precipitation	59.7 mm (2.4 in)	46 of 100 (Notable)
Hoopeston	United States	Record daily precipitation	67.1 mm (2.6 in)	44 of 100 (Notable)
Shubuta	United States	Record daily precipitation	170.7 mm (6.7 in)	43 of 100 (Notable)
Lake Cle Elum	United States	Record daily precipitation	29.5 mm (1.2 in)	42 of 100 (Notable)
Fingal (Legge Street)	Australia	Record daily precipitation	32.5 mm (1.3 in)	41 of 100 (Notable)
Goldstream Lake	Canada	Record daily precipitation	37.8 mm (1.5 in)	41 of 100 (Notable)
Lake Kachess	United States	Record daily precipitation	29.2 mm (1.1 in)	39 of 100 (Notable)
Port Washington	United States	Record daily precipitation	50.8 mm (2.0 in)	39 of 100 (Notable)
Narrawa (Hollywood)	Australia	Record daily precipitation	32.0 mm (1.3 in)	38 of 100 (Notable)
Warrangong	Australia	Record daily precipitation	26.2 mm (1.0 in)	38 of 100 (Notable)
St Joseph	United States	Record daily precipitation	50.8 mm (2.0 in)	37 of 100 (Notable)
Goulburn (Pomeroy)	Australia	Record daily precipitation	25.4 mm (1.0 in)	36 of 100 (Notable)
Darbys Falls (Riverslea)	Australia	Record daily precipitation	33.8 mm (1.3 in)	36 of 100 (Notable)
Vancouver Interst Brg	United States	Record daily precipitation	27.9 mm (1.1 in)	36 of 100 (Notable)
Chamarajnagar	India	Record daily precipitation	38.1 mm (1.5 in)	34 of 100 (Routine)
Hosanagar	India	Record daily precipitation	44.2 mm (1.7 in)	34 of 100 (Routine)
Rockville	United States	Record daily precipitation	46.2 mm (1.8 in)	34 of 100 (Routine)
Lake Keechelus	United States	Record daily precipitation	39.6 mm (1.6 in)	34 of 100 (Routine)
Seattle UNIV of Washin	United States	Record daily precipitation	27.2 mm (1.1 in)	34 of 100 (Routine)
1 ENE Fairfield	United States	Record daily precipitation	51.3 mm (2.0 in)	33 of 100 (Routine)
Mahackala	Russia	Record low minimum temperature	2.3 C (36.1 F)	32 of 100 (Routine)
Uniontown	United States	Record daily precipitation	70.6 mm (2.8 in)	32 of 100 (Routine)
Waynesboro	United States	Record daily precipitation	26.4 mm (1.0 in)	32 of 100 (Routine)
Plymouth Pwr Substn	United States	Record daily snowfall	7.4 cm (2.9 in)	31 of 100 (Routine)
Whiting	United States	Record daily precipitation	60.5 mm (2.4 in)	31 of 100 (Routine)
Tallangatta Dcnr	Australia	Record daily precipitation	38.4 mm (1.5 in)	30 of 100 (Routine)
Elgin Water	United States	Record daily precipitation	40.9 mm (1.6 in)	30 of 100 (Routine)
Paris Stp	United States	Record daily precipitation	56.4 mm (2.2 in)	30 of 100 (Routine)
Koorawatha (Boorowa Street)	Australia	Record daily precipitation	26.4 mm (1.0 in)	29 of 100 (Routine)
Dullstroom (Sar)	South Africa	Record daily precipitation	25.7 mm (1.0 in)	29 of 100 (Routine)
St Charles Elm Pt	United States	Record daily precipitation	43.7 mm (1.7 in)	29 of 100 (Routine)
Yercaud	India	Record daily precipitation	49.5 mm (1.9 in)	28 of 100 (Routine)
Charleston	United States	Record daily precipitation	49.3 mm (1.9 in)	28 of 100 (Routine)
Flora 5 NW	United States	Record daily precipitation	30.5 mm (1.2 in)	28 of 100 (Routine)
Enterprise	United States	Record daily precipitation	81.5 mm (3.2 in)	28 of 100 (Routine)
Ramnagaram	India	Record daily precipitation	39.6 mm (1.6 in)	27 of 100 (Routine)
Corning	United States	Record daily precipitation	45.2 mm (1.8 in)	27 of 100 (Routine)
Hillsboro	United States	Record daily precipitation	34.8 mm (1.4 in)	27 of 100 (Routine)
Beechworth Composite	Australia	Record daily precipitation	31.5 mm (1.2 in)	26 of 100 (Routine)
Tallangatta (Bullioh)	Australia	Record daily precipitation	31.8 mm (1.3 in)	26 of 100 (Routine)
Wooragee	Australia	Record daily precipitation	28.2 mm (1.1 in)	26 of 100 (Routine)
Pana	United States	Record daily precipitation	26.9 mm (1.1 in)	26 of 100 (Routine)
Valparaiso Wtr Wks	United States	Record daily snowfall	6.1 cm (2.4 in)	26 of 100 (Routine)
Rugby	United States	Record daily precipitation	27.9 mm (1.1 in)	26 of 100 (Routine)
Snoqualmie Falls	United States	Record daily precipitation	25.9 mm (1.0 in)	26 of 100 (Routine)
Holbrook (Annandayle)	Australia	Record daily precipitation	27.2 mm (1.1 in)	25 of 100 (Routine)
Holbrook (Rsl)	Australia	Record daily precipitation	29.7 mm (1.2 in)	25 of 100 (Routine)
Taganrog (Lighthouse)	Russia	Record low minimum temperature	-0.9 C (30.4 F)	25 of 100 (Routine)
Nikolaev	Ukraine	Record low minimum temperature	-1.2 C (29.8 F)	25 of 100 (Routine)
Hickory 1 E	United States	Record daily precipitation	57.9 mm (2.3 in)	25 of 100 (Routine)
Seattle Urban Site	United States	Record high maximum temperature	26.1 C (79.0 F)	25 of 100 (Routine)
St Louis Eads Brg	United States	Record low maximum temperature	6.1 C (43.0 F)	25 of 100 (Routine)
Branxholm (Stoke Street)	Australia	Record daily precipitation	31.8 mm (1.3 in)	24 of 100 (Routine)
Bangarpet	India	Record daily precipitation	30.5 mm (1.2 in)	24 of 100 (Routine)

Counts by Type and Timescale

731 records

Records set or tied on 1 May 1940 by type: Highest daily maximum 58, Lowest daily maximum 61, Highest daily minimum 36, Lowest daily minimum 28, Heaviest daily rainfall 525, Heaviest daily snowfall 21, Deepest snow cover 2.

Records on 1 May 1940 by type
Record type	Records
Highest daily maximum	58
Lowest daily maximum	61
Highest daily minimum	36
Lowest daily minimum	28
Heaviest daily rainfall	525
Heaviest daily snowfall	21
Deepest snow cover	2

Records on 1 May 1940 by timescale: all-time 0, monthly 35, daily 696.

How Much Records Were Beaten By

659 broken records

Margins by which the 659 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 97.0. Ties are not counted.

Top 20 by Significance

1 May 1940

Top 20 records on 1 May 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 May 1940	Beaver Lake, CA	daily rain	27.9 mm (1.1 in)	21.5 mm (0.8 in)	32 years	53 of 100 (Notable)
1 May 1940	Valparaiso Wtr Wks, US	daily rain	67.1 mm (2.6 in)	43.2 mm (1.7 in)	21 years	49 of 100 (Notable)
1 May 1940	Sivakasi, IN	daily rain	73.7 mm (2.9 in)	55.9 mm (2.2 in)	15 years	47 of 100 (Notable)
1 May 1940	Olympia Priest Pt Park, US	monthly rain	55.9 mm (2.2 in)	12.7 mm (0.5 in)	33 years	47 of 100 (Notable)
1 May 1940	Ko253Lpatti Sr, IN	daily rain	63.8 mm (2.5 in)	46.5 mm (1.8 in)	13 years	46 of 100 (Notable)
1 May 1940	Thomasville, US	daily rain	128.8 mm (5.1 in)	78.0 mm (3.1 in)	4 years	46 of 100 (Notable)
1 May 1940	Casey, US	daily rain	59.7 mm (2.4 in)	40.6 mm (1.6 in)	40 years	46 of 100 (Notable)
1 May 1940	Hoopeston, US	daily rain	67.1 mm (2.6 in)	48.3 mm (1.9 in)	4 years	44 of 100 (Notable)
1 May 1940	Shubuta, US	daily rain	170.7 mm (6.7 in)	97.0 mm (3.8 in)	3 years	43 of 100 (Notable)
1 May 1940	Lake Cle Elum, US	daily rain	29.5 mm (1.2 in)	18.1 mm (0.7 in)	12 years	42 of 100 (Notable)
1 May 1940	Fingal (Legge Street), AU	daily rain	32.5 mm (1.3 in)	20.1 mm (0.8 in)	21 years	41 of 100 (Notable)
1 May 1940	Goldstream Lake, CA	daily rain	37.8 mm (1.5 in)	19.0 mm (0.7 in)	15 years	41 of 100 (Notable)
1 May 1940	Lake Kachess, US	daily rain	29.2 mm (1.1 in)	17.3 mm (0.7 in)	17 years	39 of 100 (Notable)
1 May 1940	Port Washington, US	daily rain	50.8 mm (2.0 in)	24.1 mm (0.9 in)	38 years	39 of 100 (Notable)
1 May 1940	Narrawa (Hollywood), AU	daily rain	32.0 mm (1.3 in)	27.7 mm (1.1 in)	7 years	38 of 100 (Notable)
1 May 1940	Warrangong, AU	daily rain	26.2 mm (1.0 in)	22.6 mm (0.9 in)	33 years	38 of 100 (Notable)
1 May 1940	St Joseph, US	daily rain	50.8 mm (2.0 in)	26.7 mm (1.1 in)	21 years	37 of 100 (Notable)
1 May 1940	Goulburn (Pomeroy), AU	daily rain	25.4 mm (1.0 in)	22.1 mm (0.9 in)	33 years	36 of 100 (Notable)
1 May 1940	Darbys Falls (Riverslea), AU	daily rain	33.8 mm (1.3 in)	23.6 mm (0.9 in)	7 years	36 of 100 (Notable)
1 May 1940	Vancouver Interst Brg, US	daily rain	27.9 mm (1.1 in)	12.9 mm (0.5 in)	12 years	36 of 100 (Notable)

Significance is a score from 0 to 100 combining margin, the age of the old record and the length of the station's record. How it is computed.

The Same Date in Other Years

1795 to 1940

Records set or tied on this calendar date in each year from 1795 to 1940. 1940 had 731 records.

Counts for years before the ledger starts come from the same station rules.

Records on 05-01 in each year
Year	Records
1795	1
1802	1
1804	1
1814	1
1818	1
1835	1
1836	1
1840	1
1846	2
1847	1
1850	1
1851	1
1857	1
1860	1
1861	1
1864	2
1865	1
1868	2
1872	1
1875	4
1878	2
1879	2
1880	3
1881	2
1884	1
1885	1
1886	2
1887	2
1888	2
1889	3
1890	2
1891	5
1892	6
1893	2
1894	5
1896	1
1897	4
1898	1
1899	8
1900	1
1901	5
1902	7
1903	9
1904	9
1905	13
1906	12
1907	31
1908	20
1909	49
1910	13
1911	22
1912	18
1913	54
1914	23
1915	27
1916	27
1917	37
1918	34
1919	150
1920	186
1921	41
1922	92
1923	64
1924	63
1925	118
1926	500
1927	125
1928	190
1929	142
1930	263
1931	537
1932	220
1933	706
1934	305
1935	276
1936	368
1937	218
1938	304
1939	227
1940	731
1941	333
1942	1,036
1943	526
1944	229
1945	350
1946	415
1947	655
1948	774
1949	405
1950	439
1951	894
1952	557
1953	917
1954	1,506
1955	772
1956	1,106
1957	359
1958	448
1959	764
1960	737
1961	588
1962	615
1963	704
1964	312
1965	360
1966	707
1967	948
1968	426
1969	429
1970	1,075
1971	444
1972	562
1973	841
1974	589
1975	286
1976	673
1977	545
1978	1,202
1979	612
1980	507
1981	1,265
1982	508
1983	1,423
1984	640
1985	789
1986	512
1987	1,098
1988	1,058
1989	949
1990	922
1991	633
1992	1,201
1993	1,101
1994	1,210
1995	1,365
1996	1,439
1997	804
1998	951
1999	932
2000	809
2001	1,106
2002	1,221
2003	964
2004	887
2005	1,320
2006	734
2007	857
2008	979
2009	679
2010	1,151
2011	716
2012	796
2013	976
2014	941
2015	550
2016	844
2017	1,163
2018	519
2019	788
2020	1,099
2021	834
2022	319
2023	912
2024	458
2025	430
2026	623

Download the Data

Data for records on 1940-05-01: CSV or JSON. Field meanings are on the data page.

Sources: Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Made with Natural Earth. Public domain map data. Borders are Natural Earth's de facto depiction. Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 20	606
20 to 40	43
40 to 60	7
60 to 80	2
80 to 100	1